Summers will coach the offensive line for the Razorbacks, while Johnson will coach linebackers. Petrino's staff includes: quarterbacks coach Garrick McGee from Northwestern, defensive coordinator Ellis Johnson from Mississippi State and defensive line and special teams coach Kirk Botkin from Louisiana-Monroe.

Petrino was hired to replace Houston Nutt, who stepped down and became the head coach at Mississippi.

Mark Robinson will be director of football operations, after serving as a football operations and coaching assistant at Texas A&M. Dean Campbell will leave Air Force to work as the Razorbacks' director of high school relations.

"I'm excited about the staff that we have assembled for the University of Arkansas," Petrino said. "These coaches and administrators have a wealth of experience at the highest levels of collegiate athletics and in the professional ranks."